UCCU HELOC Payment Calculator Explained

A HELOC payment depends on the plan. On $50,000 at 9%, an interest-only payment is $375.00 a month, and a principal and interest payment over 10 years is $633.38 a month.

Enter your own amount, rate and periods below, then compare the two kinds of payment in the table.

HELOC payment calculator

Draw period, interest only: $375.00 a month for 10 years.

Repayment period: $449.86 a month for 20 years.

The payment rises by $74.86 a month when repayment starts, and the repayment period adds $57,967 of interest.

Two kinds of HELOC payment

Some HELOC plans let you pay only the interest in the draw period, and others charge principal and interest from the start. Check which one your offer uses, and its draw period, before you read the table. The figures are our own example of 9% on $50,000, not a quote.

Payment typeMonthly paymentBalance falls?
Interest only$375.00No
Principal and interest, 10 years$633.38Yes
Principal and interest, 15 years$507.13Yes
Principal and interest, 20 years$449.86Yes

Why the payment rises later

The CFPB says that after the draw period ends you stop being able to borrow from your HELOC and enter the repayment period.

The CFPB says monthly payments are often significantly higher once you enter repayment.

An interest-only payment never repays the balance, so when the draw period ends the same $50,000 must be repaid over the repayment years. At 9% over 20 years that is $449.86 a month, which adds $57,967 of interest. The HELOC monthly payment calculator shows the same rise at different rates and balances.

Frequently asked questions

How is an interest-only HELOC payment calculated?

Balance x rate / 12. On $50,000 at 9% that is $375.00 a month, and none of it reduces the balance.

How is a principal and interest payment calculated?

It is the standard loan payment for the balance over the years it is repaid. On $50,000 at 9% over 10 years it is $633.38 a month, and in the spreadsheet =-PMT(rate/12, years*12, balance).

Which rate do I enter?

The rate on your own offer. A HELOC rate often changes after an introductory period, so run the calculator once with the starting rate and once with a higher one.

What does the payment become after the draw period?

The balance is then repaid with principal. On the example, $50,000 at 9% repaid over 20 years is $449.86 a month, $74.86 more than interest only. Your agreement sets the repayment years.

Is this page run by the lender?

No. MyCalcExpert is an independent site. The figures here are estimates from the formulas shown, so confirm your payment with your lender.

Sources

Every figure on this page comes from the pages below. Checked 2026-11-09. Rules change, so confirm with your own servicer.

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